Panting, soaked in sweat and cum, the two anthro animals, one much bigger than a man, once twice as big as that, stared at each other in shock.
"I-I'm not smaller, uh, Mrs. Paulson." Ty stammered. He eyed the pendulous massive breasts of his new giant mare lover and felt himself stirring again.
"You're..." She stopped, looked around the room slowly, and realization set in. "Oh my God! Your... your... oh!" She looked over herself, swayed her long horse tail, which smacked a nearby wall like a whip, and blinked several times, understanding her giant scale. "Oh!" She said simply, eyes wide. "W-Will I... will I go back down?"
"I don't know!" Ty stared in awe, admiring her giant curves and muscles. "This is new to me."
"God damn." She slowly back off of Ty, bumping into the couch, and knocked the TV stand over with one foot, causing it to plummet down and smash Rick's $6000 3dtv. "Oh shit! Sorry!"
"Hey, hey! It's okay! Just try to... stay calm, all right?" Ty gulped, wondering what the hell had happened. He hadn't willed his spunk to grow her or transform her to begin with. Something wasn't right! "Let's... let's see if I can get it to wear off."
"You can do that?" Mrs. Paulson said hopefully, trying not to move, since she felt her firm furry ass hitting the solid wall behind her as she tried to crouch down.
Ty concentrated on shrinking Mrs. Paulson back down, at least to her former size. But to his shock and certainly the white mare's, she jolted suddenly and began to grow even larger!
"TY!" Mrs. Paulson screamed. "HELP!"
"Shit, shit, shit!" Ty concentrated, and willed it to stop. In a panic, now standing at her side and trying to comfort her by reaching up and rubbing his fingers through her mane, it took a few moments before his desire kicked in, during which the beautiful white mare became so huge she filled the entire living room up, pushing nearly everything out of the way.
"What did you do?!" Mrs. Paulson whimpered. "W-What did you do to me?! You made me even bigger!"
"I'm sorry!" Ty took a breath. "I don't know what happened!"
"I can't even move!" The mare said in a panic. "W-What do I do?! Am I going to keep growing?!"
"No, no." Ty said reassuringly, whispering. "I'm sorry, sweetheart. Just take a deep breath and relax."
"O-Okay!" The former milf gulped. "Okay. Just... do something! Please!"
Ty wondered what the hell had gone wrong with his power, and then realization sunk in. Something about changing *everything* messed everything else up. Just like changing Dustin's history had felt wrong, making the entire world okay with him being a huge anthro horse had fucked up something else. He concentrated, willed only Mrs. Paulson to be OK with his anthro horsiness, and waited. A relaxing feeling of calm soaked into him, and it felt right again.
"O-Okay, I'm gonna try again." Ty whispered.
"Ohhh...." The mare whimpered. "What if I break your house!? How the hell am I going to... to explained... all... this?!"
"It's okay." Ty reassured her. "Just relax."
"O-Okay." Mrs. Paulson said, exhaling sharply through her big equine nose and snorting.
Shrink back down, Ty willed. Please.
The mare jolted again, gritting her teeth and waiting to smash out of the entire house, but instead she began to reverse direction very quickly until she was Ty's size again, just a little too big for a human house instead of on the verge of destroying it.
"Oh!" Mrs. Paulson grinned. "Oh thank God! I'm back to... back to..." She looked herself over and suddenly looked perplexed. "You know, I actually don't mind being a horse like this."
"Me either." Ty grinned. "I like you this way."
"I bet." Mrs. Paulson put her hand on her hip and crouched down as she stood, meeting Ty in the middle of the destroyed living room and putting her head on his chest. "It's Eileen by the way."
"Uh... Eileen." Ty grinned.
"Yeahhhh," The older woman grinned and knickered. "So care to explain to me what the hell just happened? Is this me? Is this who I am now? A big sexy mare woman?"
The two anthro animals sat down next to each other, exchanging a sweet kiss, and Ty gulped nervously. "Well, see, uh, Mrs... Eileen."
The mare grinned at the slip, hugging the other animal's huge arm and pulling it over her shoulder.
"I... well, I can do whatever I want."
"Really?" She smiled. "That's definite. But what about me?"
"No, watch." He grinned mischievously, and gave Eileen bigger boobs. The mare stared down at her already ample chest in shock and gasped in pleasure as they swelled a full cup bigger, which at her size was a hell of a lot of tits.
"Whoa!" She stared at Ty. "So... so... uh... you..." She stared blankly at the big sexy black horse and tilted her head. "Did... did you seduce me?!"
"Uh... not intentionally." Ty admitted. "But it was nice."
"God damn. I guess I'm kind of a freak, then, huh?" She laughed and blushed. "And what about... this?" She waved her hands over her body, then around the living room. "And, uh, that? Did you lose control of... whatever? Is that what that was?"
"Sort of." Ty said sheepishly. "I'm still learning what I can do."
The mare's ears perked up in alarm and she blinked several times. "Oh! So, wait... uh... were you always a huge black horse? Because, I... remember, you know? I remember watching you grow up and develop, and..." She blushed deeply and looked away, to which Ty embraced her lovingly and kissed her neck.
"I think you only have those memories." He said, gulping as her face turned horrified.
"So... so what are you, actually?!" She said in horror. "If you haven't always been a huge black horse guy?!"
"A 15 year old boy." He said sheepishly, and watched as Eileen's expression turned even more horrified.
"Jesus Christ! So I fucked a kid?!" She seemed mortified and then stopped. "No, no, whatever. I fucked a horse. Man." She blushed again and kissed Ty's neck. "I guess either one'll land me in prison, so whatever. Would you be a sweetie and change me back to me before my husband gets home?"
"One more time?" Ty grinned. "I promise you won't grow this time."
"Oh, fuck, why not?!" Eileen agreed.